129499-78-1 2-O-alpha-D-Glucopyranosyl-L-ascorbic acid AA-2G Ascorbic acid 2-O-glucoside L-Ascorbic acid 2-O-alpha-glucoside Pyrido(1,2-a)indol-6(7H)-one, 8,9-dihydro-7-(hydroxy(5-methyl-1H-imidazol-4-yl)methyl)-10-propyl-, (R*,S*)-